Molar and molecular weight of K2SO3

• Molecular formula: K2SO3 or K2O3S
• Relative molecular weight of K2SO3: 158.2598
• Molar mass of K2SO3: 158.2598 g/mol (0.15826 kg/mol)

Calculation of the relative molecular and molar mass of K2SO3

• Mr[K2SO3] = Ar[K] * 2 + Ar[O] * 3 + Ar[S] = 39.0983 * 2 + 15.9994 * 3 + 32.065 = 158.2598
• Molar mass (kg/mol) = Mr[K2SO3] : 1000 = 158.2598 : 1000 = 0.15826 kg/mol

K2SO3: percent composition by element

• Potassium (K) = 78.1966 : 158.2598 * 100 = 49.41 %
• Oxygen (O) = 47.9982 : 158.2598 * 100 = 30.329 %
• Sulfur (S) = 32.065 : 158.2598 * 100 = 20.261 %

Molar mass calculator